Save images in different directories depending on resolution (#62)

This makes the script dynamically select the correct cached version of
the image, depending on the current resolution.

betterlockscreen

@@ -4,9 +4,14 @@
 # Github Profile : https://github.com/pavanjadhaw
 # Project Repository : https://github.com/pavanjadhaw/betterlockscreen
 
+# find your resolution so images can be resized to match your screen resolution
+res=$(xdpyinfo | grep dimensions | sed -r 's/^[^0-9]*([0-9]+x[0-9]+).*$/\1/')
+
+init_filenames() {
+	#$1 resolution
 
 	# create folder in ~/.cache/i3lock directory
-folder="$HOME/.cache/i3lock"
+	folder="$HOME/.cache/i3lock/$1"
 
 	# ratio for rectangle to be drawn for time background on lockscreen
 	# Original Image
@@ -27,7 +32,9 @@ l_resized="$folder/l_resized.png"
 	l_dim="$folder/l_dim.png"
 	l_blur="$folder/l_blur.png"
 	l_dimblur="$folder/l_dimblur.png"
+}
 
+init_filenames $res
 
 prelock() {
 	pkill -u "$USER" -USR1 dunst
@@ -234,8 +241,6 @@ case "$1" in
 		background="$2"
 		shift 2
 
-		# find your resolution so images can be resized to match your screen resolution
-		y_res=$(xdpyinfo | grep dimensions | sed -r 's/^[^0-9]*([0-9]+x[0-9]+).*$/\1/')
 		# default blur level
 		blur_level=1
 
@@ -243,7 +248,8 @@ case "$1" in
 		while [ $# -gt 0 ]; do
 			case "$1" in
 			-r | --resolution )
-				y_res="$2"
+				res="$2"
+				init_filenames $res
 				shift 2
 				;;
 			-b | --blur )
@@ -295,7 +301,7 @@ case "$1" in
 		echo
 		echo "Converting provided image to match your resolution..."
 		# resize image
-		convert "$orig_wall" -resize "$y_res""^" -gravity center -extent "$y_res" "$resized"
+		convert "$orig_wall" -resize "$res""^" -gravity center -extent "$res" "$resized"
 
 		echo
 		echo "Applying dim and blur effect to resized image"
@@ -309,7 +315,7 @@ case "$1" in
 			-filter Gaussian \
 			-resize "$blur_shrink%" \
 			-define "filter:sigma=$blur_sigma" \
-			-resize "$y_res^" -gravity center -extent "$y_res" \
+			-resize "$res^" -gravity center -extent "$res" \
 			"$blur"
 
 		# dimblur
@@ -317,7 +323,7 @@ case "$1" in
 			-filter Gaussian \
 			-resize "$blur_shrink%" \
 			-define "filter:sigma=$blur_sigma" \
-			-resize "$y_res^" -gravity center -extent "$y_res" \
+			-resize "$res^" -gravity center -extent "$res" \
 			"$dimblur"
 
 		# lockscreen backgrounds
@@ -343,4 +349,3 @@ case "$1" in
 		echo "invalid argument"
 		;;
 esac
-